4.1 Retrieving Virtual Disk File Information

The following diagram demonstrates the steps taken to open a shared virtual disk file, retrieve virtual disk file information, and close it.

Retrieving virtual disk file information

Figure 2: Retrieving virtual disk file information

  1. The client sends an SMB2 CREATE Request with the SVHDX_OPEN_DEVICE_CONTEXT create context to open a shared virtual disk file.

     Version: 1 (0x00000001)
     HasInitiatorId: 1 (0x01)
     Reserved: 0 (0x000000)
     InitiatorId: (0x07770D201F2740834579D46F5AC43B73)
     Flags: 0 (0x00000000)
     OriginatorFlags: SVHDX_ORIGINATOR_PVHDPARSER (0x00000001)
     OpenRequestId: (0x000000001EC7871E)
     InitiatorHostNameLength: 16 (0x0010)
     InitiatorHostName: client01 (0x0063006C00690065006E007400300031)
    
  2. The server responds with an SMB2 CREATE Response giving the handle to the open identifying the shared virtual disk file and SVHDX_OPEN_DEVICE_CONTEXT_RESPONSE context.

     Version: 1 (0x00000001)
     HasInitiatorId: 1(0x01)
     Reserved: 0 (0x000000)
     InitiatorId: (0x07770D201F2740834579D46F5AC43B73)
     Flags: 0 (0x00000000)
     OriginatorFlags: SVHDX_ORIGINATOR_PVHDPARSER(0x00000001)
     OpenRequestId: (0x000000001EC7871E)
     InitiatorHostNameLength: 16 (0x0010)
     InitiatorHostName: client01 (0x0063006C00690065006E007400300031)
    
  3. The client sends an SMB2 IOCTL Request with SVHDX_TUNNEL_INITIAL_INFO_REQUEST to retrieve the virtual disk information.

     OperationCode: RSVD_TUNNEL_GET_INITIAL_INFO_OPERATION (0x02001001)
     Status: 0 (0x00000000)
     RequestId: (0x000000001Ec7871E)
    
  4. The server sends an SMB2 IOCTL Response with SVHDX_TUNNEL_INITIAL_INFO_RESPONSE containing the virtual disk information.

     OperationCode: RSVD_TUNNEL_GET_INITIAL_INFO_OPERATION (0x02001001)
     Status: 0 (0x00000000)
     RequestId: (0x000000001Ec7871E)
     ServerVersion: 1 (0x00000001)
     SectorSize: 512 (0x00000200)
     PhysicalSectorSize: 256 (0x00000100)
     Reserved: 0 (0x00000000)
     VirtualSize: (0x4000000000000000)
    
  5. The client sends an SMB2 CLOSE Request to close the shared virtual disk file.

  6. The server sends an SMB2 CLOSE Response indicating the close was successful.

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